You can choose the headers while creating your Pages. Simply follow the structure below to create the header:
<!-- Start Header -->
<header class="header_area carbon-blue home-1-header" id="header" >
<div class="main_header_area animated" >
<div class="container-fluid nav-padding" >
<nav id="navigation1" class="navigation carbon-blue" >
<div class="nav-header" >
.....
</div>
<div class="nav-menus-wrapper" >
.....
</div>
<div class="button-box" >
.....
</div>
</nav>
</div>
</div>
</header>
<!-- End Header -->
If you want to edit the footer from the bottom, for that you have to visit the home-page1 there you can easily find out the code for the footer. You may also discover the footer in Homepage1, Homepage2, Homepage3, and many more respectively.
<!-- Start Footer -->
<footer class="footer-block-home-1">
<div class="container">
<div class="row align-items-center mb-40">
.....
</div>
<div class="row">
.....
</div>
<div class="row footer-bottom-bar">
.....
</div>
<div class="row footer-bottom-copyright">
.....
</div>
</div>
</footer>
<!-- End Footer -->